Finding the Third Proportional to 131,179.78 and 278,123.91

Step by Step Solution

1. Step 1: Write the proportion equation
   131,179.78 : 278,123.91 = 278,123.91 : x
2. Step 2: Convert to fraction form
   131,179.78/278,123.91 = 278,123.91/x
3. Step 3: Cross multiply
   131,179.78x = 278,123.91 × 278,123.91
4. Step 4: Simplify right side
   131,179.78x = 77,352,907,227.76
5. Step 5: Solve for x
   x = 77,352,907,227.76/131,179.78
6. Step 6: Final answer
   x = 589,670.96